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Magnetochemistry
Special Issues
Magnetic Nanoparticles: State of the Art and Future Perspectives
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Magnetic Nanoparticles: State of the Art and Future Perspectives

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Nanospecies".

Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 8983

Special Issue Editor

Dr. Karim Zehani

E-Mail Website
Guest Editor
Institute of Chemistry and Materials, Université Paris-Est Créteil, 94320 Thiais, France
Interests: intermetallic nanoparticles; ferrites nanoparticles; soft magnetic nanoparticles; semi-hard magnetic nanoparticles; hard magnetic nanoparticles; magnetic nanoparticles for medical applications

Special Issue Information

Dear Colleagues,

Nanotechnology has grown rapidly over the past twenty years, and nanoparticles generally form the basis of this new technology and find multiple applications in several fields, such as health, electronics, environment, transport, consumer products, and care. Magnetic nanoparticles, in particular, are increasingly used to improve therapeutic protocols or diagnostic methods, but also for several other applications, such as catalysis, data storage, and energy.

The multiple applications of magnetic nanoparticles depend on their magnetic behavior (soft, semi-hard, or hard). For example, magnetically hard materials can be used as permanent magnets, semi-hard materials can be used for magnetic recording, and soft materials can be used for electronic components (inductors or transformers). Furthermore, they can be used as a contrast agent, as a tracer, as an agent for the treatment of cancer by magnetic hyperthermia, or as an antibacterial agent.

There are a multitude of magnetic nanoparticle synthesis methods that can produce nanoparticles with a given magnetic behavior.

This is why this Special Issue will be devoted to a state of the art of these magnetic nanomaterials as well as their future prospects for various applications.

Dr. Karim Zehani
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetic nanoparticles
  • soft magnetic materials
  • semi-hard magnetic materials
  • hard magnetic materials
  • synthesis of magnetic nanoparticles by soft chemistry
  • synthesis of magnetic nanoparticles by high energy milling

Published Papers (5 papers)

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Research

14 pages, 8507 KiB  
Article
Magnetic Adsorbent Based on Faujasite Zeolite Decorated with Magnesium Ferrite Nanoparticles for Metal Ion Removal
by Mariana Rodrigues Meirelles, João Otávio Donizette Malafatti, Márcia Tsuyama Escote, Alexandre Henrique Pinto and Elaine Cristina Paris
Magnetochemistry 2023, 9(5), 136; https://doi.org/10.3390/magnetochemistry9050136 - 20 May 2023
Cited by 2 | Viewed by 1320
Abstract
Magnetic nanoparticles are a promising alternative as a support in adsorption processes, aiming at the easy recovery of the aqueous medium. A faujasite zeolite (FAU) surface was decorated with magnesium ferrite (MgFe2O4) nanoparticles. FAU is a porous adsorbent with [...] Read more.
Magnetic nanoparticles are a promising alternative as a support in adsorption processes, aiming at the easy recovery of the aqueous medium. A faujasite zeolite (FAU) surface was decorated with magnesium ferrite (MgFe2O4) nanoparticles. FAU is a porous adsorbent with high specific surface area (SSA) and chemical stability. The FAU:MgFe2O4 nanocomposite 3:1 ratio (w w−1) promotes the combination of the surface and magnetic properties. The results showed the effectiveness of the MgFe2O4 immobilization on the FAU surface, exhibiting a high SSA of 400 m2 g−1. The saturation magnetization (Ms) was verified as 5.9 emu g−1 for MgFe2O4 and 0.47 emu g−1 for FAU:MgFe2O4, an environmentally friendly system with soft magnetic characteristics. The magnetic nanocomposite achieved high adsorption values of around 94% removal for Co2+ and Mn2+ ions. Regarding its reuse, the nanocomposite preserved adsorption activity of above 65% until the third cycle. Thus, the FAU:MgFe2O4 nanocomposite presented favorable adsorptive, magnetic, and recovery properties for reuse cycles in polluted water. Full article
(This article belongs to the Special Issue Magnetic Nanoparticles: State of the Art and Future Perspectives)
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13 pages, 2951 KiB  
Article
Preparation of Magnetic Iron Oxide Incorporated Mesoporous Silica Hybrid Composites for pH and Temperature-Sensitive Drug Delivery
by Madhappan Santhamoorthy, Kokila Thirupathi, Selvakumar Krishnan, Loganathan Guganathan, Sushma Dave, Thi Tuong Vy Phan and Seong-Cheol Kim
Magnetochemistry 2023, 9(3), 81; https://doi.org/10.3390/magnetochemistry9030081 - 12 Mar 2023
Cited by 5 | Viewed by 1669
Abstract
In clinical applications for cancer treatment, chemotherapy coupled with thermotherapy is highly considered. The development of multifunctional nanocomposite materials is an appealing strategy for use in various applications including biomedical applications. We present the preparation of dopamine-modified mesoporous silica material, in which magnetic [...] Read more.
In clinical applications for cancer treatment, chemotherapy coupled with thermotherapy is highly considered. The development of multifunctional nanocomposite materials is an appealing strategy for use in various applications including biomedical applications. We present the preparation of dopamine-modified mesoporous silica material, in which magnetic iron oxide nanoparticles (FeNP) were grown onto the outer surface via the complexation of iron (Fe(III) and Fe(II)) ions with the dopamine groups modified on the silica hybrid and subsequent chemical reduction approaches. The prepared magnetic iron oxide incorporated with mesoporous silica hybrid composite nanoparticles (FeNP@MSHC NPs) had a large surface area (346 m2/g), pore size (3.2 nm), and pore volume (0.048 cm3/g). The formation of FeNP on the outer surface of the FeNP@MSHC NPs results in superparamagnetic characteristics. Furthermore, the prepared FeNP@MSHC NPs have a high drug (Dox) loading capacity (~62%) as well as pH- and temperature-responsive drug release efficiency. In addition, the MTT assay result shows the biocompatibility of the prepared FeNP@MSHC NPs. As a result, the FeNP@MSHC NPs could be utilized in cancer treatment for pH and temperature-sensitive delivery of chemotherapeutic agents to the target sites. Full article
(This article belongs to the Special Issue Magnetic Nanoparticles: State of the Art and Future Perspectives)
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12 pages, 3876 KiB  
Article
Coercivity and Exchange Bias in Ti-Doped Maghemite Nanoparticles
by Venkatesha Narayanaswamy, Imaddin A. Al-Omari, Aleksandr S. Kamzin, Hafsa Khurshid, Abbas Khaleel, Bashar Issa and Ihab M. Obaidat
Magnetochemistry 2022, 8(12), 165; https://doi.org/10.3390/magnetochemistry8120165 - 23 Nov 2022
Cited by 3 | Viewed by 1627
Abstract
Ti-doped maghemite nanoparticles of average crystallite size 12.9 nm were synthesized using the sol–gel method. The XRD profile mainly showed the presence of maghemite phase with very small phases of TiO2 (rutile and anatase). Magnetization hysteresis loops of the nanoparticles were obtained [...] Read more.
Ti-doped maghemite nanoparticles of average crystallite size 12.9 nm were synthesized using the sol–gel method. The XRD profile mainly showed the presence of maghemite phase with very small phases of TiO2 (rutile and anatase). Magnetization hysteresis loops of the nanoparticles were obtained between −4 T to +4 T at temperatures of 2, 10, 30, 50, 70, 100, 150, 200, and 300 K under field cooling (FC) of 1, 2, 3, and 4 T and zero-field cooling conditions (ZFC). The coercivity displayed nonmonotonic field dependence while it decreased sharply with temperature and vanished at 150 K at all fields. Horizontal hysteresis loop shifts were observed in the 2–150 K temperature range in both the ZFC and FC conditions. The exchange bias effect became negligible in both ZFC and FC states above 50 K. Magnetization vs. applied field measurements were conducted in both ZFC and FC cooled conditions at several temperatures in the range of 2–400 K, with spin freezing being observed below 50 K. The exchange bias effect obtained below 50 K is suggested to be attributed to the competing roles of the long-range dipolar and short-range exchange coupled interactions. Full article
(This article belongs to the Special Issue Magnetic Nanoparticles: State of the Art and Future Perspectives)
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10 pages, 18025 KiB  
Article
The Effect of Co-Doping on the Structural and Magnetic Properties of Single-Domain Crystalline Copper Ferrite Nanoparticles
by Gassem M. Alzoubi
Magnetochemistry 2022, 8(12), 164; https://doi.org/10.3390/magnetochemistry8120164 - 22 Nov 2022
Cited by 5 | Viewed by 1468
Abstract
Nanoparticles of Co-doped copper ferrite, Cu0.75Co0.25Fe2O4, were successfully synthesized by hydrothermal method. The preparation conditions were optimized to produce small nanoparticles with crystallite size of 20 nm that fall into the single-domain regime. The influence [...] Read more.
Nanoparticles of Co-doped copper ferrite, Cu0.75Co0.25Fe2O4, were successfully synthesized by hydrothermal method. The preparation conditions were optimized to produce small nanoparticles with crystallite size of 20 nm that fall into the single-domain regime. The influence of Co-doping on the structure and magnetic properties of pure copper ferrite, CuFe2O4, was investigated. The prepared ferrite nanoparticles were found to be in a single structural phase with a spinel-type structure, according to the XRD and FT-IR measurements. When compared to pure Cu ferrite, the addition of Co increased the lattice constant and decreased the density. The TEM results confirmed the spherical morphology of the prepared ferrite nanoparticles. For the entire temperature range of the ferrite nanoparticles, the magnetization measurements showed a single ferrimagnetic phase. It was observed that the coercivity and remanent magnetization increased with decreasing temperature. Magnetic anisotropy was found to increase with Co-doping in comparison to pure Cu ferrite. The ZFC–FC magnetization curves showed that the blocking temperature (TB) of the prepared nanoparticles is above room temperature, demonstrating that they are ferrimagnetic at room temperature and below. Additionally, it was found that decreasing the magnetic field lowers TB. The FC curves below TB were observed to be nearly flat, indicating spin-glass behavior that might be attributed to nanoparticle interactions and/or surface effects such as spin canting and spin disorder. Full article
(This article belongs to the Special Issue Magnetic Nanoparticles: State of the Art and Future Perspectives)
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13 pages, 4232 KiB  
Article
Molarity Effects of Fe and NaOH on Synthesis and Characterisation of Magnetite (Fe3O4) Nanoparticles for Potential Application in Magnetic Hyperthermia Therapy
by Lokesh Srinath Ganapathe, Jamal Kazmi, Mohd Ambri Mohamed and Dilla Duryha Berhanuddin
Magnetochemistry 2022, 8(11), 161; https://doi.org/10.3390/magnetochemistry8110161 - 21 Nov 2022
Cited by 7 | Viewed by 2163
Abstract
In this study, the effect of molarity on the structural, magnetic, and heat dissipation properties of magnetite nanoparticles (MNPs) was investigated to optimise the parameters for potential application in magnetic hyperthermia therapy (MHT). MHT works based on the principle of local temperature rise [...] Read more.
In this study, the effect of molarity on the structural, magnetic, and heat dissipation properties of magnetite nanoparticles (MNPs) was investigated to optimise the parameters for potential application in magnetic hyperthermia therapy (MHT). MHT works based on the principle of local temperature rise at the tumour site by magnetic iron oxide nanoparticles (MIONPs) with the application of an alternating magnetic field. MHT is a safe method for cancer treatment and has minimal or no side effects. Magnetite (Fe3O4) is the best material among MIONPs to be applied in local MHT due to its biocompatibility and high saturation magnetisation value. MNPs were prepared by co-precipitation at varying molarity. Structural characterisation was performed via X-ray powder diffraction (XRD) for crystalline structure analysis and field-emission scanning electron microscopy (FESEM) for morphology and particle size analysis. Measurement of the magnetic properties of the as-synthesised MNPs was carried out using a vibrating sample magnetometer (VSM). Power loss (P) was determined theoretically. The increase in molarity resulted in significant effects on the structural, magnetic, and heat dissipation properties of MNPs. The particle size and saturation magnetisation (Ms) decreased with the gradual addition of base but increased, together with crystallinity, with the gradual addition of iron source. M3 recorded the smallest crystalline size at 3.559 nm. The sample with the highest molarity (M4) displayed the highest heat generation capacity with a p value of up to 0.4056 W/g. High p values at the nano-scale are crucial, especially in local MHT, for effective heat generation, thus proving the importance of molarity as a vital parameter during MNP synthesis. Full article
(This article belongs to the Special Issue Magnetic Nanoparticles: State of the Art and Future Perspectives)
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